123556 cube root pls
1 answer:
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ANSWER
EXPLANATION
The quadratic equation given to us is
We add half the square of the coefficient of
to both sides of the equation to obtain,
This implies that,
The right hand side simplifies to
The left hand side is a perfect square.
This gives us
We take the square root of both sides
This evaluates to
We make x the subject.
We now split the square root sign to get
.
The correct answer is A.
EXPLANATION
The quadratic equation given to us is
We add half the square of the coefficient of
to both sides of the equation to obtain,
This implies that,
The right hand side simplifies to
The left hand side is a perfect square.
This gives us
We take the square root of both sides
This evaluates to
We make x the subject.
We now split the square root sign to get
.
The correct answer is A.
$\sf\underline\bold\blue{Information\:given\:in\:the\:question:}$
- π =
- $\sf{Diameter = 20inches}$
$\space$
$\sf\underline\bold\blue{What\:we\:have\:to\:find?}$
- $\sf{Area\:of\:the\:circle.}$
$\space$
$\sf\underline\bold\blue{Answer:}$
- $\sf\small{Area\:of\:the\:circle\:is : 314.15}$
$\space$
$\sf\underline\bold\blue{Calculations:}$
Here we have the value of the circle's diameter that is 20inches. So, first we have to calculate the radius of the circle using the formula :
$\mapsto$ $\sf\bold{Radius=}$ $\sf\dfrac{Diameter}{2}$
$\space$
$\sf\underline\bold\blue{Calculating\:the\:required\:values:}$
$\mapsto$ $\sf\bold{Radius=}$ $\sf\dfrac{20}{2}$
$\sf{Convert \: to \: the\:lowest\:term(Divide),}$
$\mapsto$ $\sf\underline\bold{Radius=10}$
☆Now we know the value of the radius . So now let's calculate the area of the circle.
$\space$
$\sf\bold{Area\:of\:circle:}$ π$\sf{ r \: ^{2} }$
$\sf\bold{Evaluating \: the\:required\:values:}$
$\sf\bold{Area\:of\:circle=3.1415(10)^2}$
$\space$
$\sf\bold{Area\:of\:the\:circle=3.1415\times10\times10}$
$\sf\bold{Now,}$
$\sf\bold{Area\:of\:the\:circle:3.1415\times100}$
$\space$
$\sf\underline\bold\green{Thus,Area\:of\:the\:circle\: is \: 314.15}$
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